There can be several reasons. Many ski schools only offer courses on specific starting days and periods that they consider best suited to the age and experience level. Beginners' courses usually start on Sundays or Mondays, while advanced skiers often have the flexibility to join the course on several days. Ski schools frequently have one or more days off (usually Saturday). In the case of short-term bookings, it is also possible that the course is already full. We therefore recommend booking the course as early as possible. Private offers are very flexible regarding the starting days and duration, but can be fully booked quickly, especially during the holidays.